Definition of evidence for Students. 1  1 : a sign which shows that something exists or is true : indication They found evidence of a robbery. 2  2 : material presented to a court to help find the truth about something.
Francis Crick and his American colleague, James Watson, discovered the double helix structure of DNA. For this fundamental finding Francis, James and Maurice Wilkins were awarded the Nobel Prize for Physiology or Medicine in 1962.nravelling the double helix Stories The discovery of the structure of DNA by James Watson and Francis Crick in 1953 is one of the most famous scientific discoveries of all time. Unravelling the double helix Stories.
Report Abuse. DNA structure DNA structure was first described by James Watson and Francis Crick in 1953. Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living organisms.All living things contain DNA, with the exception of some viruses with RNA genomes.he nucleotides are joined in such a way that they form a double helix that is like a twisted rope ladder. The steps of the ladder are made by the paired nitrogen bases of opposing nucleotides. A-T and C-G The sides of the ladder are alternating sugars and phosphates.